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Inessa05 [86]
3 years ago
9

Luna simplifies the expression (2x-4)-(3x+2) correctly. which expression represents luna's result

Mathematics
1 answer:
pickupchik [31]3 years ago
5 0
Okay, so first you have to factor out that negative throughout the parenthesis.
(2x-4)-3x-2
Then, put like terms together so you can organize your problem.
2x-3x-4-2
Now all you have to do is combine the like terms!
-x-6
Oh look, that's a. A is the answer.
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-13x=90-2y <br> -6x=48-2y
Kisachek [45]

While it's pretty obvious to most of us that


-13x=90-2y

-6x=48-2y


is a system of linear equations, it'd be well to include that info plus the instructions "solve this system of linear equations."


Subtract the 2nd equation from the first:


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-----------------------

-7x = 42. Then x = -42/7, or x = 6.


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